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In architecture and construction, a sliding glass door (also patio door or doorwall [1] [2]) is a type of sliding door made predominantly from glass, that is situated in an external wall to provide egress and light.
The doors form a 2.5 m (8 ft 2 in) high glass and steel screen the entire length of the platform. The door opening is 2.1 m (6 ft 11 in) wide, and the system includes integrated passenger information and digital advertising screens.